What's in YOUR muffler???

[Ken Juul]

I think Claude's fix is a good one.  Either brass or stainless should last for years.  I would make it a permanent fix, by epoxying the assembly in place, I don't trust that the bolts through the fiberglass would hold.  If it was decided to use RTV so that it could be easily changed in the future, I would suggest welding 1/4x20 nuts onto fender washers and epoxy them in place on the inside of the muffler.

2ndWish.  Yes the hose can be changed.  The hardest part is getting the old one off.  I took a hacksaw and cut out the center section between the bottom of the riser and the top of the muffler.  Then use the hacksaw to cut the top section off the riser, make a vertical cut, then pry with a large screwdriver to break the hose loose. The bottom is a bit harder because of the fiberglass.  I used a sharp knife and started cutting the rubber again almost vertically.  When you get to a wire jump over it and cut some more. When your through cutting use wire cutters to clip the wires.  You may need to cut somemore rubber away to get access.  Clean the exposed muffler and riser.  Lube the inside of the new hump hose with dish soap, slide it as far up the riser it will go, then man handle it onto the the muffler and slide down.  I put the clamps on first, the top can be loose around the top, the hump will hold it. The bottom one I expanded and slid over the muffler input and left it on the top of the muffler, when the hump hose was in place, lifted and tightened.  Ron suggests putting a piece of leather between the clamps and the soft hump hose to keep from gouging the hose.  A Dremell with the proper bit is a much better tool to use, just don't have one in my tool box.

[2ndwish]

Ken- Thanks. Now which length of hump hose did you use?

T

[Ken Juul]

I don't remember.  I think I measured the old one and got the one that was the best fit.

[Ron Hill]

2nd : You need to get the 9".
Then you might have to cut it shorter to match your length needed for your boat.

[Fuzzy]

If I remember correctly, brass is not good around sea water.  Use bronze or stainless, not brass.
Larry

[Ted Pounds]

If I remember correctly, brass is not good around sea water.  Use bronze or stainless, not brass.
Larry

That is true.  Zinc is an alloy of brass and zinc is very quickly electrolysed in salt water.   

[Indian Falls]

Bronze is copper/tin sometimes including phosphorus, manganese, aluminum and silicon.

Brass is generally about 70%copper/30%zinc and sometimes aluminum, arsenic, manganese, silver, tin, iron, nickel and/or lead.  There are 20-30 different brass alloys.

DR or DZR brass with 1% tin, (dezincification resistant) intended for harsh corrosive (the sea) environments.